/*
 *下面两个自己字节的函数源自GcsSloop
 *GitHub: https://github.com/GcsSloop
 */
package com.weihuagu.receiptnotice.util;
public class ByteUtil {
        /**
         * 二进位组转十六进制字符串
         *
         * @param buf 二进位组
         * @return 十六进制字符串
         */
        public static String parseByte2HexStr(byte buf[]) {
                StringBuilder sb = new StringBuilder();
                for (byte b : buf) {
                        String hex = Integer.toHexString(b & 0xFF);
                        if (hex.length() == 1) {
                                hex = '0' + hex;
                        }
                        sb.append(hex.toUpperCase());
                }
                return sb.toString();
        }

        /**
         * 十六进制字符串转二进位组
         *
         * @param hexStr 十六进制字符串
         * @return 二进位组
         */
        public static byte[] parseHexStr2Byte(String hexStr) {
                if (hexStr.length() < 1) return null;
                byte[] result = new byte[hexStr.length() / 2];

                for (int i = 0; i < hexStr.length() / 2; i++) {
                        int high = Integer.parseInt(hexStr.substring(i * 2, i * 2 + 1), 16);
                        int low = Integer.parseInt(hexStr.substring(i * 2 + 1, i * 2 + 2), 16);
                        result[i] = (byte) (high * 16 + low);
                }
                return result;
        }
}
